Apparatus for facilitating removal and replacement of railway car truck assemblies



y 1966 w. .1. SAXONMEYER 3,251,311

APPARATUS FOR FACILITATING REMOVAL AND REPLACEMENT OF RAILWAY CAR TRUCK ASSEMBLIES Filed Oct. 29, 1964 5 Sheets-Sheet l fl P: m N A f N I Q N L l A I l R,

0 A &:

I my l K INVENTOR. WALLACE d. SAXO/VMEYER /yprr l A TTORNE' rs N M ,MJ-OW May 17, 1966 w. J. SAXONMEYER 3,251,311

APPARATUS FOR FACILITATING REMOVAL AND REPLACEMENT OF RAILWAY CAR TRUCK ASSEMBLIES Filed Oct. 29, 1964 5 Sheets-Sheet 2 EIVVENTOR. WALLACE J. SAXO/VMEYER L BY law Q A TTOR/VE Y5 May 17, 1966 w. J. SAXONMEYER 3, ,3

APPARATUS FOR FACILITATING REMOVAL AND REPLACEMENT OF RAILWAY CAR TRUCK ASSEMBLIES Filed Oct. 29, 1964 5 Sheets-Sheet 5 INVENTOR.

WAL LHCE' 1 SIIXO/VMEYER May 17, 1966 w. J. SAXONMEYER 3, 5 ,3

APPARATUS FOR FACILITATING REMOVAL AND REPLACEMENT OF RAILWAY CAR TRUCK ASSEMBLIES Filed 001;. 29, 1964 5 Sheets-Sheet 4 5 INVENTOR.

WALLACE SAXO/VMEYER A 7'7'ORNEY5 May 17, 1966 w. J. SAXONMEYER APPARATUS FOR FACILITATING REMOVAL AND REPLACEMENT OF RAILWAY CAR TRUCK ASSEMBLIES 5 Shets-Sheet 5 Filed Oct. 29, 1964 INVENTOR. WALLACE (J. SHXO/VMEYER NEYS APPARATUS FOR FACILITATING REMOVAL AND REPLACEMENT F RAILWAY CAR TRUCK ASSEMBLIES Wallace .I. Saxonmeyer, Park Forest, 111., assignor to Whiting Corporation, a corporation of Illinois Filed Oct. 29, 1964, Ser. No. 407,455 9 Claims. (Cl. 104--32) This invention relates generally to equipment for facilitating maintenance operations on railway cars, 'and more particularly to an apparatus for facilitating removal and replacement of a railway car truck.

It is a primary object of the present invention to provide a new and improved apparatus for facilitating removal and replacement of a railway car truck, which apparatus includes means for lifting one end of a railway car and other means for swinging a disconnected truck from beneath the lifted end of the car and swinging a replacement truck into place for connection to the car.

It is -a further .object of the present invention to provide an apparatus of the type described including a turntable having a track section thereon which forms a continuation of other track when the turntable is in one rotary position and jacking means located centrally and peripherally of the turntable for lifting one of a railway car which has its truck supported on said track section, thereby to facilitate removal of said truck and replacement of the latter by another truck.

It is another object of the present invention to provide an apparatus of the type described including, a first track section mounted on a turntable in offset relation from the center thereof and forming a continuation of other track when the turntable is in one rotary position, a second track section on said turntable also in offset relation from the center thereof and forming a continuation of a truck replacement track when the tumtable is rotated for aligning the second track section with the replacement track, and jacking means located centrally and peripherally of the turntable for lifting one end of the railway car which has its truck supported on said first track section, thereby to facilitate removal of said truck and replacement of the latter byanother truck supported on said second track section.

Still another object of the present invention is the provision of a turntable of the type described which includes releasable means for locking the turntable in one position and stop means carried by the turntable and United States Patent 0 FIG. 6 is an enlarged, fragmentary plan view of the apparatus of this invention primarily showing the stop means and the turntable locking means; 1

FIG. 7 is a view taken along line 7-7 of FIG. 6; and

FIG. 8 is a section taken along line 8-8 of FIG. 6.

Referring now to the drawings and in particular to FIGS. 2 and 3, the apparatus of this invention will be seen to include a turntable 10 which is preferably formed from a plurality of structural steel members 11' and deck plate sections 12. The turntable includes a first track section 14 offset from the center of the turntable and including rails 15 and 16. These rails may The turntable includes another track section 18 offset from the center of the turntable and parallel with track section 14. Track section 18 includes rails 19 and 20 preferably of the same construction as rails 15 and 16. When the turntable is in the position illustrated in FIG. 3, track section 14 forms an extension of track 21 which includes conventional rail members suitably supported adjacent the turntable. Also, when the turntable is in its FIG. 3 position, track section 18 constitutes a continuation of a track section 22 which includes conventional rail members suitably supported adjacent the tumtable. When the turntable is rotated through 90 in a counterclockwise direction as seen in FIG. 3, turntable track section 14 constitutes an extension of a track 23 while turntable track section 18 constitutes a continuation of a track 24. It will be apparent that if the turnmovable between operative and inoperative positions for These and other objects and advantages of the pres-- ent invention will become apparent from the following specification disclosing a preferred embodiment of the invention which is illustrated in the accompanying drawings.

In the drawings:

FIGS. la, 1b and 1c are diagrammatic plan views of the apparatus of this invention showing the same sequentially in various stages of operation;

FIG. 2 is an enlarged view, partly in vertical central section and partly in elevation, of the apparatus of this invention;

FIG. 3 is a section taken along line 3-3 of FIG. 2;

FIG. 4 is an enlarged side elevational view of one of the jack assemblies forming a part of the apparatus of this invention;

FIG. 5 is a view taken along line 55 of FIG. 4;

table is rotated through in a clockwise direction from its FIG. 3 position, turntable track sections 14 and 18 will constitute .continuations of tracks 24 and 23, respectively. Track sections 23 and 24 are preferably formed of conventional rail members suitable supported adjacent the turntable.

Now looking to FIG. 2, turntable 10 will be seen to include an annular bearing ring 26 which rides on a plurality of circumferentially spaced rollers 27. Rollers 27 are each supported in a suitable bracket 28 mounted on framework 29 which serves as a base or support for the turntable. It will be apparent that rollers 27 sup port the turntable for rotation about its center. Framework 29 is supported in a pit so that the track sections on the turntable have the same elevation as the adja part by an annular bushing 31 which rotatably engages,

a cylindrical, central pedestal 32. Pedestal 32,'which is non-rotatably mounted on framework 29, includes a top deck plate 33 having its marginal portion overhanging a portion of the deck plate 12 of the turntable in vertical spaced relation thereto. The engagement between turntable bushing 31 and the cylindrical pedestal 32 journals the turntable for rotation of the latter about its vertical central axis.

The turntable also has fixed thereto a ring gear 35 adapted to have the teeth thereof mesh with the teeth of a gear 36. Gear 36 is driven for rotation about a vertical axis by an electric motor 37 through a reduction gear box 38. mounted on framework 29. It should now be, apparent that electric motor 37 serves to drive or rotate the turntable about its vertical central axis. Motor 37 may be of the reversible type or gear box 38 may includesuitable means so that the turntable can be rotated in either the underside of the railway car at locations spaced oppo- Motor 37 and gear box 38 are suitably site each other transversely of the car. Jacks 4t) and 41 are of identical construction; accordingly, only one jack, viz. jack 41 which is illustrated in FIGS. 4 and 5, will be described.

Jack 41 includes a fabricated base structure 42 suitably supported on structural members, such as a pair of wide flange sections 43 (see FIG. 2), forming a part of base structure 29 which supports the turntable. An upright member 44, such as a wide flange structural member, extends from base 42. A carriage primarily consisting of two plates 46 suitably secured together in spaced relation is supported on upright member 44 for vertical reciprocal movement. Each plate 46 supports a pair of rollers 47 which roll between the flanges of member 44. The carriage includes a block 48 secured between plates 46 and including a vertical threaded bore in threading engagement with a screw 50. Screw 50 has the upper end thereof journaled in a bearing 51 secured at the top of upright member 44, and the lower end thereof journaled in a bearing 52 mounted on base 42. The threads on screw 50 are enclosed by an axially compressible, flexible tube 53 for preventing the entry of foreign matter into these threads of the screw. A horizontally disposed gear (not shown) is mounted on the lower end of screw 50 in base 42, which gear has teeth in meshing engagement with threads of a worm gear 55, which worm gear is suitably journaled in base 42. A chain 56 connects a gear 57 mounted on worm with the output or drive gear 58 of an electric motor 60. It will be understood that energizing motor 60, which is of the reversible type, brings about raising or lowering of the carriage depending on the direction of rotation of the screw 50.

A lifting arm 62 is supported on the carriage for horizontal reciprocal movement relative to the latter. Lifting arm 62 includes a pair of identical right angle arms 63 each having a foot portion 64. The horizontal run portion of each arm 63 is supported between pairs of upper and lower roller assemblies 66 and 67, respectively, which are mounted to plate 46 of the carriage. It will be apparent that the roller assemblies mount the lifting arm for horizontal reciprocal movement relative to the carriage of the jack. Feet 64 of lifting arm 62 support a pad plate 68 which is adapted for lifting engagement with the underside of a railway car near one side of the latter.

A plate 70 is secured to the roller assemblies at the outside of each arm 63 of the lifting arm. Each plate 70 includes suitable bracket means 71 mounting one end of a pneumatic cylinder 72. Each cylinder 72 has its piston rod secured by a pivotal connection 73 to the lifting arm. Actuation of pneumatic cylinders 72 brings about horizontal movement of the lifting arm. Cylinders 72 may be actuated and controlled by a solenoid operated air valve assembly 74 of suitable construction. A spring mounted plate 75, which is adapted to engage the side of a railway car, is associated with limit switch means (not shown) electrically connected with the solenoid operated valve assembly 74 for shutting off the flow of air to cylinders 72 thereby to limit or control inward movement of arm 62 for preventing damage to the side of the railway car.

It should now be apparent that pad plate 63 may be moved upwardly or downwardly by energizing electric motor and moved inwardly or outwardly by actuation of pneumatic cylinders 72. The lifting plate 68 is shown in its lowermost and outermost position in solid lines in FIG. 4, and plate 68 is shown in its uppermost and innermost position in broken lines in FIG. 4.

As mentioned above, both jacks 40 and 41 are of identical construction. As noted in FIGS. 2 and 3, jack 41 is supported at the periphery of the turntable and jack 40 is supported centrally of the turntable. Base 42 of jack 40 is mounted on a platform 76 forming a part of center pedestal 32. Deck plate 33 of the pedestal includes a central opening for receiving the vertically extending jack.

Means are provided for locking the turntable in the position illustrated in FIG. 3. These means, which are illustrated in FIGS. 6-8, include a pin member 77 slidably supported between a pair of plates 78 and 79, which plates are bolted together in spaced apart relation by a number of fasteners 80 and spacer sleeves 81. Plate 79 is anchored to stationary structural pieces 82 and 83 at the periphery of the turntable. Pin 77 is laterally supported between a number of rollers 84 which are mounted on the underside of plate 78. It will be understood that pin 77 is mounted for axial reciprocal movement. The pin includes a roller 85 at one end thereof to facilitate its entry into a socket 86 which opens horizontally of the turntable at the periphery thereof. A pneumatic cylinder 87 is connected with the other end of the pin by a clevis arrangement 88. Actuation of the pneumatic cylinder provides movement of the pin between its solid and broken line positions illustrated in FIGS. 6 and 7. When the pin is in its broken line position as shown in these two figures, it is fully received in turntable socket 86.

Socket 86 is formed in part by diverging plates 90 and 91. The inner end of the socket is defined by an angle 92. Plates 90 and 91 and angle 92 are suitably secured to the structural framework of the turntable. It will be apparent that entry of pin member 77 into socket 86 results in locking the turntable to prevent rotation of the latter. Means are provided for stopping and positioning a railway car truck on the turntable when the latter is locked in its FIG. 3 position by the locking means just described. The truck positioning or stopping means includes an arm 94 which is pivotally mounted on a pin 95 secured to one of the structural members 11 of the turntable. When arm 94 is in its vertical position, the upper end thereof is located adjacent the inner surface or side of a bar 15 defining one of the rails of turntable track section 14.

As noted in FIG. 8, one end of pin 95 is mounted in an aperture in structural member 11 and the other end of the pin is mounted in a suitable aperture in a plate 96 which is secured between the flanges of structural member 11. A pair of spacer collars 97 on shaft 95 locate arm 94 axially of shaft 95 so that the upper end of the arm is spaced closely adjacent the side of bar 15. The lower end of arm 94 is pivotally secured to a clevis arrangement 98 which is secured to one end of a rod 99. Rod 99 passes through a suitable opening 100 in one of the structural members 11 and the other end of the rod passes through an opening 101 in angle 92 and thereby extends into the inner end of socket 86. A collar 103 is secured to rod 99 intermediate the ends thereof, which collar abuts one end of a spring 104 encircling the rod between collar 103 and a plate 105 which is apertured to receive freely rod 99. Spring 104 acts to urge rod 99 to the right as seen in FIGS. 6 and 7 thereby to rotate arm 94 to its inclined or inoperative position (shown in broken lines in FIG. 7) against a stop 107 which is secured to the framework of the turntable. Another stop 108 also secured to the framework of the turntable engages one edge of arm 94 for limiting movement of the latter when rod 99 is moved from right to left as seen in FIGS. 6 and 7. It will be understood that socket 86, arm 94 and the linkage associated with the same are all located beneath the deck plate of the turntable.

Pin 77 in entering socket 86 acts to move arm 94 to its vertical or operative position. As the pin approaches its innermost position in socket 86, roller 85 of the pin engages the end of rod 99 and moves the same (from right to left as seen in FIGS. 6 and 7) thereby to erect arm 94. Upon removal of pin 77 from socket 86, spring 104 acts to shiftthe rod for moving arm 94 to its tilted or inoperative position.

When arm 94 is in its vertical position, the upper end thereof is adapted to engage the flange of a rail wheel supported on rail 15. Arm 94 includes an inclined upper surface 94a which to some extent conforms to the curvature of the rail wheel flange, designated 110 in FIGS. 7 and 8. Arm 94 is located along rail so that when the former is erected and a rail car is moved onto track section 14 from track 21 (from top to bottom as seen in FIG. 3) the flange of the forwardmost rail wheel on rail 15. will engage arm 94 for stopping the railway car and locating the truck thereof on track section 14 in symmetrical relation with a horizontal centerline extending between jacks 40 and 41. The trucks need not be precisely located with respect to this centerline, but it is preferable to locate the transverse centerline of the truck as close as practical to this centerline extending between the jacks so the latter will engage the carat the area thereof adjacent the point of connection with the truck.

It will be understood that suitable control means preferably including a single control panel are provided for operating both jacks 40 and 41, turntable 10, and the locking means therefor from a convenient location, such as platform or deck 33 of central pedestal 32. The electrical system for jack motors 60 desirably includes suitable interlock and limit switch means so that both lifting arms operate simultaneously therebyto prevent pos-' sible tipping of a railway car. Suitable limit switch means may "be associated with the turntable drive motor 37 for automatically stopping the turntable when the track sections thereon are aligned with the adjacent stationary tracks. The operation of the apparatus of this invention may best be understood by reference to FIGS. 1a, 1b and 1c.

The position of the turntable illustrated in FIG. 1a corresponds to the position of the turntable shown in FIG. 3. Assume the turntable is locked in place; accordingly, arm 94 is erected to its operative position. A rail car 112 (shown in phantom lines in FIGS. 112-1c) is moved along track 21 by suitable means from top to bottom as seen in FIGS. la-lc. As track section 14 of the turntable is aligned with track 21 and forms a continuation thereof, the truck at the forward end of car 112, designated 113 is FIGS. lb, 1c and 2, will roll onto the turntable until the flange of the leading rail Wheel on rail 15 engages raised stop arm 94 thereby stopping and positioning the truck on the turntable. The jacks are actuated so that lifting pads 68 engage the underside of the rail car near the sides thereof; they are then raised for taking the weight of the rail car off truck 113 to be disconnected. Next, truck 113 on track section 14 is disconnected from the railway car. Then, the jacks are actuated for lifting the end of a railway car to bring about complete separation from this end of the rail car from truck 113 on track section 14.

A replacement truck 114 (shown in phantom lines in FIGS. 1a and 1b) is brought onto turntable track section 18 from track 22 which may lead to a shop or siding where replacement trucks are stored ready for being connected to rail cars. Preferably, a suitable hand operable turntable 115 is associated with track 22 to permit turning of the replacement truck, if necessary, so that the same will be properly positioned on track section 18 of the turntable for connection with the rail car. Because of brake linkage connections, etc., the replacement truck must 'be brought onto the turntable 10 with a particular end first for proper connection with the rail car.

The turntable is rotated through 180 for removing worn or used truck 113 of car 112 from beneath the jacked end of the latter and for swing or moving replacement truck 114 to a position beneath the lifted end of the car for connection with the latter. After the turntable has been rotated 180 as just described, jacks 40 and 41 are actuated for lowering the lifted end of the car onto replacement truck 114. After the replacement truck is connected to car-112, the latter may be moved off the turntable in either direction along track 21.

FIG. 1b illustrates the position of the turntable after it is rotated 90 in a counterclockwise direction from its FIG. 1a position. In the embodiment of the invention shown for purposes of illustration, it is necessary to rotate the turntable 180 to position the replacement truck beneath the lifted end of the car because track 1 sections 14 and 18 on the turntable are in parallel relation one on each side of the center thereof. It will be realized that track section 18 need not be' in parallel relation with track section 14. For example, track section 18 could be at a right angle with track section 14 in which case it would be necessary only to rotate the turntable to locate the replacement truck beneath the lifted end of the car. Preferably, track section 18 on the turntable should be in alignment with track 22, which may be termed the replacement truck track, when turntable track section 14 is in alignment with track 21, which may be termedthe rail car progression track, so that when the used truck is being disconnected from the rail car the replacement truck may be brought onto the turntable, and when the re placement truck is being connected to the car the worn or used truck may be moved 01f the turntable. This will provide for the fastest possible operation and will not delay replacement trucks being brought onto the turntable or used trucks being taken from the turntable for delivery to a repair area.

In the embodiment of the invention illustrated in the drawings, tracks 23 and 24 communicate with the turntable at right angles to tracks 21 and 22. If desired, track 24 could be used to supply replacement trucks to the turnatable when the latter is in the position illustrated in FIG. 1b. When the turntable is in the FIG. 1b position, track 23 might be used to remove the used trucks from the turntable for delivery to a repair area. It Will be appreciated that various arrangements of track both on the turntable and in the area adjacent the turntable might be used. These arrangements are dictated by environmental requirements, and the particular track arrangement illustrated is not to be interpreted as limiting the invention in any way.

While the invention has been shown in but one form, it will be obvious to those skilled in the art that it is not to be so. limited. On the contrary, the invention is susceptible of various forms and modifications without departing from the spirit and scope of the appended claims.

I claim:

1. An apparatus for facilitating removal and replacement of a railway car truck comprising, a turntable having two rail tracks mounted thereon each being oifset from the center of the turntable for travel in an arcuate path upon movement of the turntable, a first stationary support located centrally of said turntable and having first jacking means adapted for lifting engagement with the underside of a railway car near one side thereof, a second stationary support located adjacent the periphery of said turnable and having second jacking means adapted for lifting engagement with the underside of said railway car near the other side thereof, said first and second jacking means being arranged for lifting one end of said car when the truck at said one end of the latter is supported on one of said tracks, said tracks being disposed relative to each other so that when said end of the railway car is lifted by said first and second jacking means and said truck is disconnected, the latter may be swung from beneath said one end of the car and a replacement truck on the other of said tracks may be swung beneath said one end of the car by rotating said turntable.

2. The apparatus according to claim 1 further defined by, locking means located at the periphery of said turntable for locking the latter in at least one rotary position, and releasable stop means, mounted adjacent one of the rails of one of said tracks, which stop means includes an arm movable between an operative and an inoperative position and adapted in its operative position to engage one of the rail wheels of said truck thereby to stop and position the latter on the turntable, said stop means and locking means being operatively associated with each other so that said arm is moved to its operative position simultaneously with locking of said turntable. v

3. An apparatus for facilitating removal and replacement of a railway car truck comprising, a turntable having a first track thereon offset from the center of the turntable and constituting a continuation of other track when the turntable is in a first position so that a railway car on said other track may have one end thereof brought onto the turntable and supported thereon by resting the truck at said one car end on said first track, jacking means located centrally and peripherally of said turntable and engageable with said car at opposite sides thereof for lifting said one end of the car, a second track on said turntable offset from the center thereof and being provided to support a replacement truck, said second track being arranged on said turntable relative to the first. track so that after the first mentioned truck is disconnected and swung from beneath the lifted end of the car by rotating the turntable, the replacement truck is swung beneath the lifted end of the car for being connected to the latter.

4. An apparatus for facilitating removal and replacement of a railway car truck comprising, a turntable having a first track thereon ofiset from the center of the turntable and constituting a continuation of other track when the turntable is in a first position so that a railway car on said other track may be brought onto the turntable and supported thereon by resting the truck at said one car end on said first track, releasable means for locking said turntable in said first position, stop means on said turntable including an arm adjacent one of the rails of said first track and movable between operative and inoperative positions, which arm is adapted in its operative position to engage a rail Wheel of said truck for stopping the latter on the turntable, said stop means and said releasable means being operatively associated with each other so that said arm is moved to its operative position simultaneously with actuation of said releasable means to lock the turntable in said first position, jacking means located centrally and peripherally of said turntable and engageable with said car at opposite sides thereof for lifting said one end of the car, a second track on said turntable offset from the center thereof and being provided to support a replacement truck, said second track being arranged on said turntable relative to the first track so that after the first mentioned truck is disconnected and swung from beneath the lifted end of the car by rotation of the turntable, the replacement truck is swung beneath the lifted end of the car for being connected with the latter.

5. An apparatus for facilitating removal and replacement of a railway car truck comprising, a turntable having a first track thereon offset from the center of the turntable and constituting a continuation of other track when the turntable is located in a first position so that a railway car on said other track may be brought onto the turntable and supported thereon by resting the truck at said one car end on said first track, jacking means located centrally and peripherally of said turntable and being engageable with said car at opposite sides thereof for lifting said one end of the car, a second track on said turntable offset from the center thereof and constituting a continuation of a replacement truck track when the turntable is rotated to align the second track with the truck track, which second track is provided to receive and support a replacement truck, said second track being arranged on said turntable relative to said first track so that after the first mentioned truck is disconnected and the turntable is unlocked and rotated to swing the former from beneath the lifted end of the car, the replacement truck is swung beneath the lifted end of the car for being connected to the latter.

6. The apparatus according to claim 5 further defined by, releasable means located at the periphery of said turntable for locking the latter in said first position, and stop means on the turntable including a member movable between operative and inoperative positions and adapted in its operative position to engage a rail wheel on said first mentioned truck for stopping and positioning the latter on said turntable, said stop means being operatively associated with said releasable means so that upon locking the turntable in said first position said member is moved to its operative position thereby to stop and locate the first mentioned truck on said first track.

7. The construction for positioning a railway car truck on a turntable of the type having a track section thereon constituting a continuation of other track when the turntable is located in a first rotary position, said construction comprising stop means carried by the turntable and including a member adjacent one of the rails of said track section and movable between operative and inoperative positions, which member is adapted in its operative position to engage a rail wheel on a rail car truck supported on said track section, releasable means located on the periphery of said turntable for locking the latter in said first position, said stop means being associated with said releasable means so that when the latter is actuated to lock the turntable in said first position said member is moved to its operative position.

8. The construction for positioning a railway car truck on a turntable of the type having a track section thereon constituting a continuation of other track when the turntable is located in a first rotary position, said construction comprising stop means carried by the turntable and including an arm mounted adjacent one of the rails of said track section for movement between a first position wherein the arm engages a rail wheel of a rail car truck supported on said track section and a second position wherein the arm permits free passage of said truck along said track section, said turntable including a socket opening horizontally at the periphery of the turntable, a rod having one end thereof extending axially into the inner end of said socket and connected at its other end with said arm so that movement of said one end of the rod in a direction away from the periphery of said turntable causes said arm to be moved to its operative position, a pin slidably anchored adjacent the periphery of said turntable for being received in said socket when the turntable is in its first position, which pin engages said one end of the rod and moves the same in said direction when the pin is received in said socket thereby simultaneously locking the turntable and actuating said stop means, and means for sliding said pin.

9. An apparatus for facilitating removal and replacernent of a railway car truck comprising, a turntable havmg a track thereon offset from the center of the turntable and constituting a continuation of other track when the turntable is in a first position so that a railway car on said other track may have one end thereof brought onto the turntable and supported thereon by resting the truck at said one car end on said first mentioned track, jacking means located centrally and peripherally of said turntable and engageable with said car at opposite sides thereof for liftlng said one end of the car, whereby after disconnectng said truck and lifting said one end of the car by said acking means, said truck may be swung from beneath the car by rotating said turntable. Y

References Cited by the Examiner UNITED STATES PATENTS 1,094,026 4/1914 Simmonds 10435 1,858,768 5/1932 Ellstrorn 104-34 2,919,657 1/1960 Wack 104-48 ARTHUR L. LA POINT, Primary Examiner.

F. W. MONAGHAN, Assistant Examiner. 

1. AN APPARATUS FOR FACILITATING REMOVAL AND REPLACEMENT OF A RAILWAY CAR TRUCK COMPRISING, A TURNTABLE HAVING TWO RAIL TRACKS MOUNTED THEREON EACH BEING OFFSET FROM THE CENTER OF THE TURNTABLE FOR TRAVEL IN AN ARCUATE PATH UPON MOVEMENT OF THE TURNTABLE, A FIRST STATIONARY SUPPORT LOCATED CENTRALLY OF SAID TURNTABLE AND HAVING FIRST JACKING MEANS ADAPTED FOR LIFTING ENGAGEMENT WITH THE UNDERSIDE OF A RAILWAY CAR NEAR ONE SIDE THEREOF, A SECOND STATIONARY SUPPORT LOCATED ADJACENT THE PERIPHERY OF SAID TURNTABLE AND HAVING SECOND JACKING MEANS ADAPTED FOR LIFTING ENGAGEMENT WITH THE UNDERSIDE OF SAID RAILWAY CAR NEAR THE OTHER SIDE THEREOF, SAID FIRST AND SECOND JACKING MEANS BEING ARRANGED FOR LIFTING ONE END OF SAID CAR WHEN THE TRUCK AT SAID ONE END OF THE LATTER IS SUPPORTED ON ONE OF SAID TRACKS, SAID TRACKS BEING DISPOSED RELATIVE TO EACH OTHER SO THAT WHEN SAID END OF THE RAILWAY CAR IS LIFTED BY SAID FIRST AND SECOND JACKING MEANS AND SAID TRUCK IS DISCONNECTED, THE LATTER MAY BE SWUNG FROM BENEATH SAID ONE END OF THE CAR AND A REPLACEMENT TRUCK ON THE OTHER OF SAID TRACKS MAY BE SWUNG BENEATH SAID ONE END OF THE CAR BY ROTATING SAID TURNTABLE. 